Salih, W. K. and Noor Fareen Abdul Rahim, E. R. A. (2019) “The internal supply chain of operation and green sustainability”, Opción, 350, pp. 1221-1231. Available at: http://www.produccioncientifica.luz.edu.ve/index.php/opcion/article/view/24768 (Accessed: 26September2025).